Addition with Regrouping: 177 + 23

Addition with Regrouping Calculator
First addend
Second addend

What is 177 + 23?

Answer

177 + 23 =
200

With regrouping: 2 carries — into the tens and the hundreds

177 + 23 in a column. Carries are the small circled digits above the columns.
1carry1carry
1 7 7
+23
200

Column by column: 177 + 23

  • Ones: 7 + 3 = 10 — write 0, carry 1.
  • Tens: 7 + 2 + 1 = 10 — write 0, carry 1.
  • Hundreds: 1 + 1 = 2 — write 2.

177 + 23 = 200

Second check: 200 − 177 = 23

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FAQ

What is 177 + 23?

177 + 23 = 200

How do you check that 177 + 23 = 200?

Subtract one addend from the sum: 200 − 23 = 177, and 200 − 177 = 23. Getting the other addend back means the sum is right.

How many carries are there in 177 + 23?

2 carries: every time a column added up to 10 or more, its ones digit was written and 1 was carried to the next column on the left.

Is 23 + 177 the same as 177 + 23?

Yes. Addition is commutative, so both give 200; the column looks the same with either number on top.

See Also